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            <div><h4 class="title">
                <a name="asio.reference.io_context.post"></a><a class="link" href="post.html" title="io_context::post">io_context::post</a>
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    <p>
        <a class="indexterm" name="asio.indexterm.io_context.post"></a>
        (Deprecated: Use <a class="link" href="../post.html" title="post"><code class="computeroutput"><span
            class="identifier">post</span></code></a>.) Request the <a class="link" href="../io_context.html"
                                                                       title="io_context"><code
            class="computeroutput"><span class="identifier">io_context</span></code></a> to invoke the given
        handler and return immediately.
    </p>
    <pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span>
    <span class="keyword">typename</span> <a class="link" href="../LegacyCompletionHandler.html"
                                             title="Legacy completion handler requirements">LegacyCompletionHandler</a><span
                class="special">&gt;</span>
<a class="link"
   href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span
        class="emphasis"><em>DEDUCED</em></span></a> <span class="identifier">post</span><span class="special">(</span>
    <span class="identifier">LegacyCompletionHandler</span> <span class="special">&amp;&amp;</span> <span
                class="identifier">handler</span><span class="special">);</span>
</pre>
    <p>
        This function is used to ask the <a class="link" href="../io_context.html" title="io_context"><code
            class="computeroutput"><span class="identifier">io_context</span></code></a> to execute the given
        handler, but without allowing the <a class="link" href="../io_context.html" title="io_context"><code
            class="computeroutput"><span class="identifier">io_context</span></code></a> to call the handler
        from inside this function.
    </p>
    <p>
        The <a class="link" href="../io_context.html" title="io_context"><code class="computeroutput"><span
            class="identifier">io_context</span></code></a>
        guarantees that the handler will only be called in a thread in which the
        <code class="computeroutput"><span class="identifier">run</span><span class="special">()</span></code>,
        <code class="computeroutput"><span class="identifier">run_one</span><span class="special">()</span></code>,
        <code class="computeroutput"><span class="identifier">poll</span><span class="special">()</span></code>
        or <code class="computeroutput"><span class="identifier">poll_one</span><span class="special">()</span></code>
        member functions is currently being invoked.
    </p>
    <h6>
        <a name="asio.reference.io_context.post.h0"></a>
        <span><a name="asio.reference.io_context.post.parameters"></a></span><a class="link"
                                                                                href="post.html#asio.reference.io_context.post.parameters">Parameters</a>
    </h6>
    <div class="variablelist">
        <p class="title"><b></b></p>
        <dl>
            <dt><span class="term">handler</span></dt>
            <dd>
                <p>
                    The handler to be called. The <a class="link" href="../io_context.html" title="io_context"><code
                        class="computeroutput"><span class="identifier">io_context</span></code></a> will make a copy
                    of the handler object as required. The function signature of the
                    handler must be:
                </p>
                <pre class="programlisting"><span class="keyword">void</span> <span
                        class="identifier">handler</span><span class="special">();</span>
</pre>
            </dd>
        </dl>
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    <h6>
        <a name="asio.reference.io_context.post.h1"></a>
        <span><a name="asio.reference.io_context.post.remarks"></a></span><a class="link"
                                                                             href="post.html#asio.reference.io_context.post.remarks">Remarks</a>
    </h6>
    <p>
        This function throws an exception only if:
    </p>
    <div class="itemizedlist">
        <ul class="itemizedlist" type="disc">
            <li class="listitem">
                the handler's <code class="computeroutput"><span class="identifier">asio_handler_allocate</span></code>
                function; or
            </li>
            <li class="listitem">
                the handler's copy constructor
            </li>
        </ul>
    </div>
    <p>
        throws an exception.
    </p>
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            <div class="copyright-footer">Copyright © 2003-2022 Christopher M. Kohlhoff<p>
                Distributed under the Boost Software License, Version 1.0. (See accompanying
                file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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